Cost to Improve Your EPC Rating (UK 2026)
Last updated 5 October 2026 · Prices based on the Ofgem price cap (October 2026 – December 2026)
Your EPC report lists the specific measures and their estimated point gains. The estimator below gives a typical budget range for each band step.
Cost to improve your EPC rating
Moving from EPC D to C typically costs £2,000–£6,500 for an average house.
- Low estimate
- £2,000
- High estimate
- £6,500
- Bands to climb
- 1
Sums typical cost per band step (insulation, heating controls, glazing, low-energy lighting, heat pump or solar for higher bands). Your EPC report lists the measures for your home.
Typical measures and EPC point gains
| Measure | Typical cost | Typical SAP gain |
|---|---|---|
| Loft insulation (to 270mm) | £400–£1,000 | +3–8 |
| Cavity wall insulation | £1,000–£2,500 | +5–10 |
| Smart heating controls & TRVs | £150–£600 | +2–4 |
| LED lighting throughout | £50–£200 | +1–2 |
| Solar panels (4kWp) | £5,500–£7,500 | +5–10 |
| Air source heat pump (after grant) | £500–£6,500 | +5–15 |
| Double glazing (from single) | £4,000–£12,000 | +3–6 |
What affects the cost
Starting point
Lower bands have cheaper quick wins.
Wall type
Solid walls make the C threshold harder.
Heating fuel
Oil and electric storage heating score poorly.
Property size
Larger homes cost more per measure.
How to reduce the cost
- Do the cheapest measures on your report first
- Check grants before paying
- Combine works to save on labour
- Get a re-assessment once done
Frequently asked questions
What's the cheapest way to improve my EPC?
Loft insulation, LED lighting and heating controls usually give the most points per pound.
Does solar improve EPC?
Yes, typically by 5–10 points.
Can I get grants to improve my EPC?
ECO4, the Great British Insulation Scheme and the Boiler Upgrade Scheme can help.
Sources and methodology
Energy prices come from the Ofgem price cap for Direct Debit customers (GB average). Installation costs are typical UK ranges from installer quotes and industry guidance, rounded. Savings use today's rates and do not predict future prices.